Senior Security Engineer

CoStar Group

Confirmed live yesterday High trust

Hybrid

Quick summary

Work type: Hybrid
Location: Arlington, VARichmond, VA
Salary: $115,000–$203,000 / yr
Employment: Full-time
Posted: 120 days ago
Freshness: Confirmed live yesterday
Nearby: 99+ roles within 25 mi

Market check

Salary context

Below market

How this pay compares to similar roles

Similar $184k

This role $159k

$102k $238k

below market most similar roles pay here above market

This role pays less than 67% of similar roles. Most pay $151,475–$216,000 — the blue band above. At the midpoint, this role pays about $159k versus about $184k for comparable roles.

Based on 240 similar postings.

Employer

About CoStar Group

CoStar Group is the leading provider of commercial real estate information, analytics, and online marketplaces, including CoStar, Apartments.com, and LoopNet platforms. Industry: Commercial Real Estate Data & Analytics

CoStar Group currently has 59 open roles on FindRole.

Listed pay typically runs $133,000–$190,000 across 59 roles with salary data.

Most-posted roles

View all roles at CoStar Group

At a glance

TL;DR · Senior Security Engineer

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JOB TITLE: Sr. Security Engineer The Sr. Security Engineer joins the security team to evolve and safeguard the enterprise security posture across network infrastructure, cloud services, SaaS platforms, and emerging AI systems. This role involves designing and auditing secure network configurations for on-premise and cloud environments, managing Secure Service Edge platforms, and enforcing policies for firewalls, load balancers, and wireless infrastructure. The engineer will also manage SaaS security governance, tuning CASB and SSE tools to detect data exfiltration, and assessing risks associated with AI platforms, copilots, and agent-based systems. Key technical requirements include experience with AWS networking, NGFWs, WAFs, and scripting in Python or PowerShell. The role requires deep knowledge of subnetting, routing, and identity-driven security models to protect human and machine-driven workflows within a complex enterprise environment.

What does a Security Engineer earn?

Median $193000 from 107 postings across 42 companies.

See salary data

Skills

AWS Network Security SaaS Security AI Security Python PowerShell Terraform Azure DevOps NGFW CASB SSE infrastructure-as-code OAuth Routing Load Balancers Threat Modeling

What you'll do

Design and implement secure network changes for on-premise and cloud environments.
Audit network designs and enforce policies for firewalls, load balancers, and wireless infrastructure.
Manage and tune Secure Service Edge (SSE) and CASB platforms to detect risky behavior.
Define SaaS security standards for logging, identity integration, and least-privilege access.
Assess security risks for AI platforms, including model access controls and data leakage risks.
Design security controls for AI-assisted workflows and developer tools.
Monitor AI-related telemetry to identify anomalous behavior or data exposure.
Perform threat modeling and risk assessments for AI integrations with enterprise systems.

What we're looking for

Bachelor’s Degree from an accredited, not-for-profit, in-person university or college.
5+ years of experience in Information Security or Security Engineering.
One or more industry-recognized certifications such as CISSP, SANS/GIAC, CCNA, or equivalent.
Strong experience securing AWS networking including NACLs, Security Groups, ALB/NLB, Transit Gateway, and Network Firewall.
Hands-on experience with NGFWs, WAFs, load balancers, and enterprise network segmentation.
Strong scripting or automation skills in Python, PowerShell, or similar.
Experience with SaaS security platforms, CASB, or SSE tooling.
Familiarity with identity-driven security models, Azure DevOps, Terraform, or infrastructure-as-code workflows (preferred).

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